Technical information

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Proc Sheet 1 05
MyX-4
REMOVING / REPLACING THE METAL DOME
1/2
Ref. SCT U33 SM DTS 004– Index A - 29/03/01 Page 5-26
Tools :
- A 0.6mm torx screwdriver
- Gloves
- Metal dome Jig
Tweezers
Preliminary operation
This procedure must be performed by a technician with gloves.
1. Remove the back cover ( Proc sheet 0 01).
2. Remove the battery ( Proc sheet 0 02).
3. Remove the front cover ( Proc sheet 0 03).
4. Unscrew the six attachment screws on the electronic board (1)
5. Remove the assembly flange (Proc sheet 1 01) then, the assembly display (Proc sheet 1 02)
Removal procedure :
1. Lift up the metal dome (2) on the electronic card (1) with tweezers.
2. Proceed to the keys cleaning by the following way:
The PCB cleaning must be carried out with isopropanol and a non fluffy duster (Sagem reference 18552498-
2).
Hold the PCB in the following way in order to release all the keys and to be able to clean them.
1 Wet the duster with alcohol and start by the bottom PCB.
2 Apply the duster on the other keys
3 Insist on the keyboard top keys
4 Apply the duster again on the bottom PCB
5 Check if there are no more residues on the keyboard.
Placement procedure :
Warning : The metal dome is not reusable, it must be necessarily replaced by a new metal dome,
unless the board is swapped and sent as level 3
1. Replace the metal dome on the electronic card, using the metal dome jig.
Further operations :
1. Replace the electronic board on the assembly plate(Proc sheet 1.03)
2. Replace the assembly display (Proc sheet 1.02)
3. Replace the assembly flange (Proc sheet 1.01)
4. Position and tighten the six attachments screws with torx settings of 0,25 N.m.
5. Replace the front cover (Proc sheet 0 03).
6. Replace the battery (Proc sheet 0 02).
7. Replace the back cover (Proc sheet 0 01).
8. Carry out the radio test (Test Sheet 06).